| Sh2-227 / Diffused Nebula, type 5 R |
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| R.A. | 05h 19m 51.0s (2000.0) |
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| Dec. | +38° 55' 00" (2000.0) |
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| Apparent Size | 22.5' |
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| Real Size | 80 light yrs. |
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| Magnitude | - |
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| Distance | 14,000 light yrs. |
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| Other IDs | LBN 781 |
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| NGC1857 / Open Cluster, type I 3 m |
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| R.A. | 05h 20m 06.0s (2000.0) |
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| Dec. | +39° 20' 36" (2000.0) |
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| Apparent Size | 5.0' |
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| Real Size | N/A |
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| # of Stars | 40 |
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| Magnitude | 7.0等 |
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| Distance | N/A |
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This image captures the faint Hα nebulae and open star clusters scattered around μAur, which is located 7.5 degrees south of Capella in the pentagon of Auriga.
Sh2-227 is a nebula with an apparent diameter of over 20 arc minutes in the upper left.
It is almost circular, and you can see that there is unevenness inside.
You can see a small open cluster of NGC1857 in 0.5 degrees north of the nebula, about 40 member stars have been gathered in 5 arc minutes in diameter.
The cluster looks unexpectedly striking because of its high star density.
Small red nebulae are located in the lower right of the field. Sh2-226 is 2 arc minutes in size, and Sh2-228, which is visible 45 arc minutes southeast of it,
is the most photographable of these nebulae and has an extension of about 8 arc minutes.
A little reddish nebula less than 1 degree to the east is IC2120, which is about 1 minute in size.
Although the detailed structure is not clear in this picture, it has been classified as a planetary nebula.
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